ACS724LLCTR-05AB-S

Current Sensors Overview

The ACS724LLCTR-05AB-S is a galvanically isolated current sensor IC from Allegro MicroSystems, utilizing Hall-effect technology for open-loop measurement. It features an SOIC-8 surface-mount package with dimensions of 4.9 mm in length and 3.9 mm in width. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports bidirectional current sensing from 0 A to 5 A. Key electrical parameters include a sensitivity of 400 mV/A, a bandwidth of 120 kHz, and a response time of 4 µs. The offset voltage is specified at ±20 mV, with linearity accuracy of ±1.5% and precision of ±0.6%. It functions reliably across a temperature range of -40°C to +150°C.

Current Sensors Feature Summary

• Galvanic isolation between the high-voltage current path and the signal output circuitry
• Open-loop Hall-effect sensing mechanism for linear analog voltage output
• Bidirectional current detection capability centered around zero volts
• Integrated low-resistance copper conduction path for minimal power loss

Current Sensors Applications

• Motor control systems requiring precise current feedback
• Switch-mode power supplies (SMPS) for overcurrent protection
• Industrial inverters and drive circuits
• Battery management systems in electric vehicles

Current Sensors Procurement Notes

Verify the specific suffix 'S' against official Allegro documentation to confirm packaging configuration, as standard variants may utilize tape-and-reel formats. Ensure the component matches the required SOIC-8 footprint and pinout specifications for your PCB layout. Cross-reference the manufacturing date code and RoHS compliance status with the latest datasheet revisions to guarantee material consistency and regulatory adherence for your production environment.

Current Sensors Selection Notes

Select this model when a compact 8-pin solution is required for currents up to 5 A. The 400 mV/A sensitivity provides a robust signal level for direct interfacing with microcontrollers or ADCs without additional amplification. Consider the 120 kHz bandwidth for applications involving higher frequency switching signals. Evaluate the thermal performance of the internal copper path relative to the expected continuous current load to ensure reliable operation within the specified temperature range.

Current Sensors Part Context

This component belongs to the ACS724 series, which represents Allegro's advanced generation of Hall-effect current sensors. The series distinguishes itself through improved accuracy and common-mode field rejection compared to earlier iterations like the ACS723. The ACS724 family offers various current ratings and package options, including SOIC-8 and SOIC-16 configurations, catering to diverse industrial and automotive requirements while maintaining a consistent interface architecture.

Current Sensors Replacement Considerations

Direct substitutes within the same series include ACS724LLCTR-05AB-T for identical electrical characteristics but different packaging. For legacy replacements, verify compatibility with ACS723 variants, noting differences in bandwidth and accuracy. Ensure any alternative part maintains the same SOIC-8 pinout and isolation voltage ratings to preserve system safety and functionality.